US 9,541,790 B2 · Direct-type backlight module and manufacturing method thereof

Abstract

A direct-type backlight module and a manufacturing method thereof are provided. The direct-type backlight module includes: a rear plate and a backlight source installed therein. The backlight source includes a LED light bar including LEDs. The LEDs have a phosphor layer disposed thereon. The phosphor layer and the LEDs have a colloid material layer sandwiched therebetween for thermal isolation. The present invention disposes the colloid material layer so as to avoid heat generated by the LEDs to be directly transferred to the phosphor layer to cause efficiency reduction, meanwhile there is no need of a large amount of phosphor layer to fabricate a large-sized film sheet and thus the material usage of the phosphor layer is reduced. The present invention can effectively use the phosphor layer to improve color saturation of display while ensuring the efficient use of LED brightness and the life span by the colloid material layer.

Claims17

Dependent claims

A direct-type backlight module, comprising:

a rear plate and a backlight source installed in the rear plate;
wherein the backlight source comprises a LED light bar, the LED light bar comprises a plurality of LEDs;
the direct-type backlight module further comprises a continuous colloid material layer and a continuous phosphor layer alternately stacked on the plurality of LEDs along a direction facing away from the plurality of LEDs to form a stacked multilayer structure, the two outmost layers of the stacked multilayer structure each are the continuous colloid material layer, one of the two outmost layers being the continuous colloid material layer is in contact with the plurality of LEDs while the other one of the two outmost layers being the continuous colloid material layer is located at a side of the stacked multilayer structure far away from the plurality of LEDs, and all the continuous phosphor layer(s) in the stacked multilayer structure is/are located between the two outmost layers;
a material of the continuous phosphor layer is a quantum dot material, a sulfide, a fluoride, a nitride or a silicate, the continuous colloid material layer is a silica gel or a resin material.

1 more element

A manufacturing method of a direct-type backlight module, comprising:

forming LEDs on a rear plate;
and
alternately forming a continuous colloid material layer and a continuous phosphor layer on the LEDs along a direction facing away from the LEDs to form a stacked multilayer structure;
wherein the two outmost layers of the stacked multilayer structure each are the continuous colloid material layer, a first one of the two outmost layers being the continuous colloid material layer is in contact with the LEDs while a second one of the two outmost layers being the continuous colloid material layer is located at a side of the stacked multilayer structure far away from the LEDs, and all the continuous phosphor layer(s) in the stacked multilayer structure is/are located between the two outmost layers;
wherein a material of the continuous colloid material layer is a silica gel or a resin material;
wherein a material of the continuous phosphor layer is a quantum dot material, a sulfide, a fluoride, a nitride or a silicate.

3 more elements

Dependencies are inferred from the claim text.

Direct-type backlight module and manufacturing method thereof

Life of this patent

Direct-type backlight module and manufacturing method thereof

Life of this patent

Abstract

Claims17